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Istituto sull'inquinamento atmosferico

Torna all'elenco Contributi in rivista anno 2017

Contributo in rivista

Tipo: Articolo in rivista

Titolo: Volatilization and oxidative artifacts of PM bound PAHs at low volume sampling (2): Evaluation and comparison of mitigation strategies effects.

Anno di pubblicazione: 2017

Formato: Elettronico

Autori: Balducci, Catia; Cecinato, Angelo; Paolini, Valerio; Guerriero, Ettore; Perilli, Mattia; Romagnoli, Paola; Tortorella, Carmela; Nacci, Renato Michele; Giove, Aldo; Febo, Antonio

Affiliazioni autori: National Research Council of Italy, Institute of Atmospheric Pollution Research (CNR-IIA), Monterotondo, RM, Italy. Electronic address: balducci@iia.cnr.it.

Autori CNR:

  • CATIA BALDUCCI
  • ANGELO CECINATO
  • ETTORE GUERRIERO
  • VALERIO PAOLINI
  • MATTIA PERILLI
  • PAOLA ROMAGNOLI

Lingua: inglese

Abstract: The artifacts induced by oxidative degradation and volatilization were assessed with regards to determination of particulate atmospheric PAHs collected at low volume conditions (2.3m3h-1) according to the EU Reference Method EN 12341:2014. In order to evaluate the oxidative degradation, PAH measures carried out through collecting airborne particulate with and without ozone denuders were examined. Simultaneously, the influence of volatilization was investigated by comparing concentrations of PAHs in particulate samples collected over 24-h and 12-h using conventional instruments. Summer and winter/spring campaigns were carried out in order to assess the influence of environmental contour on the artifact processes. Oxidative degradation led to a general decrease of PAH concentrations in both periods; in particular, the highest losses were observed for benzo[a]pyrene and perylene reaching, in average, ca. 20%. In the summer, the effect of volatilization exceeded that of oxidative degradation for light PAHs up to benzo[e]pyrene. In the winter/spring time, the influence of both artifact typologies could be mitigated by splitting the normal 24-h collection interval starting at midnight into two 12-h intervals. A mitigation of the losses could even be obtained by fixing the start time sampling fixed at noon or in the first hours of the day. Finally, the feasibility of collecting PAHs through prolonged sampling (>1 month) at the flow rate of 1.1Lmin-1 was preliminarily investigated. Results indicated that this approach is unsuitable for minimizing the oxidative artifacts.

Lingua abstract: inglese

Pagine da: 330

Pagine a: 339

Pagine totali: 10

Rivista:

Chemosphere Elsevier
Paese di pubblicazione: Regno Unito
Lingua: inglese
ISSN: 0045-6535

Numero volume: 189

DOI: 10.1016/j.chemosphere.2017.09.062

Referee: Sė: Internazionale

Stato della pubblicazione: Published version

Indicizzato da: ISI Web of Science (WOS) [28942259]

Parole chiave:

  • Atmospheric pollution
  • Ozone denuder
  • PM bound PAHs
  • Sampling artifacts

Strutture CNR:

 
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